Nasal filter



FIG. 1 is a top, front, left side perspective view of the nasal filter of the present invention;

FIG. 2 is a front elevational view of the nasal filter of FIG. 1, the rear view being a mirror image thereof;

FIG. 3 is a left side elevational view of the nasal filter of FIG. 1;

FIG. 4 is a right side elevational view of the nasal filter of FIG. 1;

FIG. 5 is a top plan view of the nasal filter of FIG. 1; and,

FIG. 6 is a bottom plan view of the nasal filter of FIG. 1. 

The ornamental design for a nasal filter, as shown and described. 